2.5.3 MOTOR ROTATION CHECK
NOTICE
Pump rotation (three-phase only):
For three-phase
applications, check for proper pump rotation prior to
introducing fluid to the pump. Reverse rotation while
the pump is filled with fluid will cause pump seal failure.
Pump damage:
Do not run the motor/pump assembly
dry for more than a few seconds. Running a motor/
pump for a prolonged period without being completely
filled with fluid may cause damage to the pump seal.
The following procedures are for three-phase
applications only. Single-phase systems are prewired to
ensure the pump motor rotates in the correct direction.
1.
With main power connected to the heating system
motor
(see
SECOIO 2.5.1
)
, energize the pump
while observing the rotation of the pump motor fan
at the rear of the motor. Refer to rotation decal on
motor for correct rotation.
h
If the pump motor does not rotate in the correct
direction, disconnect power and switch any two
electrical leads at the main power terminal block
(
L1, L2, L3
). Reconnect power.
Repeat step 1
to
ensure motor rotates in the correct direction.
3
COMPONENTS AND
OPERATION
The following is an operational description for each of
the OLA interface and system components.
OOE:
Components installed in control box may
vary depending on the particular system
configuration purchased.
3.1
INTERFACE COMPONENTS
3.1.1 LOCAL/OFF/REMOTE SWITCH
•
local
– The system is
on
.
•
off
– The system is shut
off
.
•
remote
– The system will turn on and shut
off on a signal from the 24 V DC remote
connection.
See
SECOIO 2.5.2
.
3.1.2 PRIME BUTTON
Press and hold the
prime
button to energize the pump
motor in order to remove any air in the heating system
without energizing the elements.
OOICE!
Do not run
the motor/pump assembly dry for more than five
seconds at a time.
OOE:
The
prime
function is intended for use during
the first run procedure (
see
SECOIO 3.3.1
) or
after performing maintenance on the heating
system or plumbing (
see
SECOIO 4.2
)
.
3.1.3 RESET BUTTON
Press the
reset
button to reset the pump motor protection
switch without opening the control box. The reset function
is intended for use immediately following resolving and
repairing a system fault (
see
SECOIO 4.1.1)
.
3.1.4 PRESSURE/TEMPERATURE GAUGE
The OLA model features a temperature/pressure gauge
mounted at the heating tank inlet. The gauge will
indicate a pressure increase when the pump motor is
engaged by pressing and holding the
prime
button or
during normal operation. The gauge will also indicate the
fluid’s current temperature.
OOE:
Your system’s operating pressure may vary
depending on the configuration of the engine.
3.1.5 PRESSURE RELIEF VALVE
CAUTION
!
Pressure relief valve
: If the OLA heating system is for
use with a pressurized fluid system, additional, user-
supplied pressure relief must be installed along the
heating system outlet plumbing. User-supplied pressure
relief valve plumbing must be routed back to oil sump
or to atmospheric pressure. Do not route pressure relief
plumbing back to heating system tank.
The oil pump pressure relief valve is internal to the pump
and releases pressure from the discharge side of the
pump to the suction side of the pump at 75 psi (525
kPa). No plumbing for this component is required. The
pressure relief valve cap must always point toward the
inlet side of the pump.
The OLA heating system is designed to not exceed 125
psi (862 kPa); however, the oil pump will not exceed
75 psi (517 kPa). In the event the pressure relief valve is
activated, the pump will continue to produce flow, but
will not exceed a pressure of 75 psi (517 kPa).
PRESSURE RELIEF
VALVE CAP
PUMP INLET
PUMP OUTLET
Figure 6. Typical OLA pump assembly. Note that the pressure relief
valve cap must always point toward the inlet side of pump.
